Advertisements
Advertisements
प्रश्न
To clean their spectacles, people often breathe out on glasses to make them wet. Explain why the glasses become wet.
Advertisements
उत्तर
During exhalation (or breathing out), carbon dioxide is released along with water vapours. If one breathes out onto glass, the released water vapours collide with the surface of the glass, thereby making it cooler. As a result, the water vapours present in the air surrounding the glass condense and get attached to the glass surface. Consequently, the glass becomes wet.
संबंधित प्रश्न
Water cycle increases the availability of _______.
CROSSWORD
DOWN
1. A method of water conservation.
2. Process of getting water vapour from sea water.
6. Water stored in dams is used for the generation of ______.
ACROSS
3. is a large body of non-potable water found in nature.
4. In summer, the body loses water as ______.
5. Plants undergo ______ and contribute to the water cycle.
State for the following whether it is due to evaporation or condensation:
Steam rising from a hot girdle when water is sprinkled on it.
Take out a cooled bottle of water from refrigerator and keep it on a table. After some time you notice a droplets of water around it. Why?
The water vapour gets cooled and changes into tiny water droplets that form ______ in the sky.
One of the following processes is not a step involved in the water-cycle operating in nature
Draw a diagram to show how sea water reaches a lake or pond.
The wastes removed in tertiary treatment are ______.
Match the following:
| Water cycle | Application of fertilizers |
| Nitrogen cycle | Sunlight |
| Carbon cycle | Deforestation |
| Abiotic factor | Volcanic activities |
Name three Biogeochemical cycles.
